bin/review-validate in review-1.7.2 vs bin/review-validate in review-2.0.0.beta1

@@ -13,10 +13,10 @@
 maxcolcount = 0
 colcount = 0
 ln = 0
 
 ARGF.each {|line|
-  ln += 1
+  ln = ln + 1
   if line =~ /\A\/\/([a-z]+).+\{/
     # block
     _block = $1
     puts "#{ln}: block #{_block} started, but previous block #{block} didn't close yet." unless block.nil?
     block = _block